题目内容

A monopoly ( )

A. can set the price it charges for its output and earn unlimited profits.
B. takes the market price as given and earns small but positive profits.
C. can set the price it charges for its output but faces a downward-sloping demand curve so it cannot earn unlimited profits.
D. can set the price it charges for its output but faces a horizontal demand curve so it can earn unlimited profits.

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在[Co(en)(C2O4)2]-中,Co3+的配位数是( )

A. 3
B. 4
C. 5
D. 6
E. 8

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已知H2O和Cl-作配体时,Ni2+的八面体配合物水溶液难导电,则该配合物的化学式为( )

A. [NiCl2(H2O)4]
B. [Ni(H2O)6]Cl2
C. [NiCl(H2O)5]Cl
D. K[NiCl3(H2O)3]
E. H4[NiCl6]

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配合物[Co(NH3)5Cl](NO3)2的中心原子的氧化值为( )

A. +1
B. +2
C. +3
D. +4
E. +5

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下列配合物的名称正确的是( )

A. Na3[AlF6] 六氟合铝(Ⅲ)化钠
B. [Co(NH3)2(en)2]Cl3 氯化二(乙二胺)·二氨合钴(Ⅲ)
C. [Co(NH3)4Cl2]Cl 氯化四氨·二氯合钴(Ⅲ)
D. [Cr(NH3)3(H2O)3]2(SO4)3 硫酸三氨·三水合铬(Ⅲ)
E. NH4[Co(NH3)2(NO2)4] 四亚硝酸根·二氨合钴(Ⅲ)酸铵

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